solving equations, plotting is next

ok, I managed to do what I wanted here. It plots lines tangent to an ellipse!

Please have a look at my first wxmaxima script :)

Last question - is it possible to make the last step shorter and more readable?
The one, where I declare A_RES,EL,LINE_1,LINE_2.

thanks in advance!
-- 
Janek Kozicki                                                         |
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